John Couch Adams, English astronomer, 1866-1879.
© Science Museum / Science & Society Picture Library
Carte de visite (visiting card) photograph of John Couch Adams (1819-1892) by Maull & Co. In 1845, Adams deduced mathematically the existence and location of the planet Neptune. Adams was appointed profesor of astronomy at Cambridge in 1858, and was director of the Cambridge Observatory from 1861.